1 //===- AArch64TargetTransformInfo.cpp - AArch64 specific TTI pass ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 /// This file implements a TargetTransformInfo analysis pass specific to the
11 /// AArch64 target machine. It uses the target's detailed information to provide
12 /// more precise answers to certain TTI queries, while letting the target
13 /// independent and default TTI implementations handle the rest.
15 //===----------------------------------------------------------------------===//
18 #include "AArch64TargetMachine.h"
19 #include "llvm/Analysis/TargetTransformInfo.h"
20 #include "llvm/Support/Debug.h"
21 #include "llvm/Target/CostTable.h"
22 #include "llvm/Target/TargetLowering.h"
25 #define DEBUG_TYPE "aarch64tti"
27 // Declare the pass initialization routine locally as target-specific passes
28 // don't have a target-wide initialization entry point, and so we rely on the
29 // pass constructor initialization.
31 void initializeAArch64TTIPass(PassRegistry &);
36 class AArch64TTI final : public ImmutablePass, public TargetTransformInfo {
37 const AArch64Subtarget *ST;
38 const AArch64TargetLowering *TLI;
41 AArch64TTI() : ImmutablePass(ID), ST(0), TLI(0) {
42 llvm_unreachable("This pass cannot be directly constructed");
45 AArch64TTI(const AArch64TargetMachine *TM)
46 : ImmutablePass(ID), ST(TM->getSubtargetImpl()),
47 TLI(TM->getTargetLowering()) {
48 initializeAArch64TTIPass(*PassRegistry::getPassRegistry());
51 virtual void initializePass() override {
55 virtual void getAnalysisUsage(AnalysisUsage &AU) const override {
56 TargetTransformInfo::getAnalysisUsage(AU);
59 /// Pass identification.
62 /// Provide necessary pointer adjustments for the two base classes.
63 virtual void *getAdjustedAnalysisPointer(const void *ID) override {
64 if (ID == &TargetTransformInfo::ID)
65 return (TargetTransformInfo*)this;
69 /// \name Scalar TTI Implementations
75 /// \name Vector TTI Implementations
78 unsigned getNumberOfRegisters(bool Vector) const {
87 unsigned getRegisterBitWidth(bool Vector) const {
96 unsigned getMaximumUnrollFactor() const override { return 2; }
100 } // end anonymous namespace
102 INITIALIZE_AG_PASS(AArch64TTI, TargetTransformInfo, "aarch64tti",
103 "AArch64 Target Transform Info", true, true, false)
104 char AArch64TTI::ID = 0;
107 llvm::createAArch64TargetTransformInfoPass(const AArch64TargetMachine *TM) {
108 return new AArch64TTI(TM);